Diaconu Daniela, Stangler Dominik Florian, Kahle Hans-Peter, Spiecker Heinrich
Chair of Forest Growth and Dendroecology, Albert-Ludwigs-University Freiburg, Tennenbacher Str. 4, Freiburg 79106, Germany
Chair of Forest Growth and Dendroecology, Albert-Ludwigs-University Freiburg, Tennenbacher Str. 4, Freiburg 79106, Germany.
Tree Physiol. 2016 Oct;36(10):1260-1271. doi: 10.1093/treephys/tpw053. Epub 2016 Jun 24.
The importance of European beech (Fagus sylvatica L.) for the Central European forest and wood sector demands profound research to examine the adaptive capacity of beech forests to changing environmental conditions. Quantitative wood anatomy is a valuable tool for studying the relation between structural and functional traits of trees, but due to the laborious methodology not many studies have thus far been performed on the conductive tissue of broadleaf tree species with diffuse-porous wood structure. The aim of our research was to test the effects of aspect and thinning on vessel anatomical features of European beech (vessel density, vessel size, total vessel area, vessel groups and hydraulic conductivity). Our analysis of increment cores of trees sampled from a long-term experimental research area on the Swabian Alb showed that (i) the variations in different vessel traits were mainly controlled by tree-ring width. Additionally, we could observe that (ii) thinning contributed to a safer water transport by decreasing vessel size and that (iii) the aspect modified these responses. Our results provide new insights into the plastic response of European beech wood anatomy to warmer climatic conditions and demonstrated that thinning of the forest stands modified the water-conducting system to become more resistant against hydraulic failure.
欧洲山毛榉（Fagus sylvatica L.）对中欧森林和木材行业至关重要，这就需要进行深入研究，以考察山毛榉林对不断变化的环境条件的适应能力。定量木材解剖学是研究树木结构与功能特征之间关系的宝贵工具，但由于方法繁琐，迄今为止，针对具有散孔木材结构的阔叶树种的导组织所开展的研究并不多。我们研究的目的是测试坡向和间伐对欧洲山毛榉导管解剖特征（导管密度、导管大小、导管总面积、导管群和水力传导率）的影响。我们对从施瓦本阿尔卑斯山一个长期实验研究区域采集的树木增粗芯进行分析，结果表明：（i）不同导管特征的变化主要受年轮宽度控制。此外，我们还观察到：（ii）间伐通过减小导管大小促进了更安全的水分运输，并且（iii）坡向改变了这些响应。我们的研究结果为欧洲山毛榉木材解剖学对气候变暖的可塑性响应提供了新的见解，并表明林分间伐改变了水分传导系统，使其对水力故障更具抗性。
